Question # 1

Which of the following is not strong electrolytes.

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HCl

H2SO4

HNO3

CH3COOH

Which of the following techniques involves the distribution of solute between two immiscible liquid phases.

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Chromatography

Electrophoresis

Solvent extractions

Solid phase extraction

Which of the following type of polymerization is used for the preparation of synthetic rubber.

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Free radical

Zingler natta

Cationic

Anionic

According to Henry's Law. the mole fraction of a gas (x) dissolved in a solvent is related to the pressure of the gas.

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x = k/p

x = p/k

x = k

p = k/x

As it passes into food chain, the concentration of DDT

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Remains same

Decreases

Increases

Unpredictable

The ions Sc3+ , Ca2+ and K+ have same electronic configuration as that of.

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Neon

Argon

Krypton

Xenon

The increase in boiling points of noble gases from He to Xe is due to the

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Decreases in ionization energy

Increases in polarizability

Increase in electron affinity

Increase in atomic volume

Arrhenius concept explained

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Constant heat of neutralization

Quantitative determination of acid base strength

Catalytic property of acid

All above

Which of the following elements of group 15 is a typical metal.

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P

As

Bi

Sb

If the absorbed light is green the transmitted light will be

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Purple

Orange

Violet

Black

Which of the following is strong adheaive.

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Epoxy resin

Melamine -formadehyde resin

Alkyd resins

Bakelite

What type of inter molecular force present in nylon-66^o

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Vander wall

Hydrogen bond

Dipole -dipole interactions

Sulphide linkage

Peppermint oil contains.

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Menthol

Thymol

a-pinene

Comphene

Considering the elements B, Al, Mg and K , the correct order of their metallic character is.

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B > Al > Mg > K

Al > Mg > B > K

Mg > Al > K > B

K > Mg > Al > B

Calcium cyanamide on treatment with steam under pressure gives NH3 and

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Calcium carbonate

Calcium hydroxide

Calcium oxide

Calcium bicarbonate

The only oxidation state of alkali metals in their compounds is.

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+1

+2

-1

0

The sugar present in RNA is

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D- ribose

D-Arabinose

D-Glucose

Deoxyribose

How many unpaired electron are there in a strong field iron (II) octahederal compled.

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0

1

2

4

Which of the following is the most stable towards heat.

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CaCO3

BaCO3

Na2CO3

MgCO3

An acid base titration involves a neutralization reaction in which an acid is reacted with an equivalent amount of base The titrant is always a strong acid or base The analyte may be

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Strong acid

Strong base

Weak acid and Weak base

All above

Which parameter of a chemical reaction will change with the use of a catalyst.

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Delta F, change in free energy

Delta S, change in entropy

Delta E , change in internal energy

K, the rate constant

Which of tetra chloride is resistant to hydrolysis.

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CCl4

SiCl4

GeCl4

SnCl4

Which of the following is most basic.

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Aniline

Benzylamine

Diphenylamine

N-methylaniline

What ASTM test for shear strength is designated for plastics.

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D 732

D 790

D 695

D 638

Which of the following metals form volatile carboyl with CO below 80^oC

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Cu

Fe

CO

Ni

Which is the strongest reducing agent.

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HF

HCl

HBr

HI

Fluorine is.

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Powerful oxidizing agent

Most reactive element

Used as refrigerants

All of above

Monel metal is a alloy of Ni which constrains Ni uptown

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50%

60%

70%

80%

Which of the following characteristics of adsorption is wrong.

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Adsorptoin on solids is reversible in nature

Adsorption, in general increase with increase in temperature.

Adsorption is generally selective in nature.

Both enthalpy and entropy of adsorption are negative

The total number of crystal systems and the number of Bra via is lattices are.

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7,7

7,14

14,7

14,28

Which of the following exists as polymeric chains in solid state.

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Sr Cl2

Ba Cl2

MgCl2

BeCl2

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